If the coating applied to the metal has a lower electrode potential than the metal, then in the presence of electrochemical corrosion conditions, the coating is the anode and the metal is the cathode without being corroded, which is the basis for the design of the economical protective coating. .

The main varieties of electrochemical anti-rust paints are epoxy zinc-rich primer and aluminum powder anti-rust paint. The most widely used epoxy zinc-rich primer. Zinc is the anode and iron is the cathode. The epoxy zinc-rich primer uses a binder to adhere a large amount of zinc powder to the surface of the steel to form a conductive protective coating.

Electrochemical protective coatings have excellent rust-preventing effects. They can maintain rust-preventing ability for a long period of time even in the harsh environment, but they have high cost and strict construction requirements, such as epoxy-rich zinc-based primer on metal surfaces. The handling requirements are strict, oil stains, rust and impurities not only affect the adhesion of the coating, but also hinder the effective contact of the coating with the metal. However, from the perspective of long recoating interval and construction cost, it is economically reasonable.

Leakage Tracing Test Machine

Leakage Tracing Test Machine,Leakage Tester Machine,Earth Leakage Tester,Electronic Leakage Test Machine

Dongguan Best Instrument Technology Co., Ltd , https://www.dgbestinstrument.com